
This is achieved by having multiple lines per storage file, one for each user (if the feature is enabled); each of these lines has the same format as would be the case for the userless authentication, except that they are prepended with a SHA-512 of the user's id.
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.